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51acb54760
A zero-length send is invalid with TCP, but well defined with UDP. udp:send"" was returning (nil,"refused"), indicating that it failed when the packet was actually sent. The test script reproduces the bug, and includes a tcpdump of the zero length packet being sent.
26 lines
641 B
Lua
Executable File
26 lines
641 B
Lua
Executable File
#!/usr/bin/lua
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--[[
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Show that luasocket returns an error message on zero-length UDP sends,
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even though the send is valid, and in fact the UDP packet is sent
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to the peer:
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% sudo tcpdump -i lo -n
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tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
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listening on lo, link-type EN10MB (Ethernet), capture size 65535 bytes
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13:40:16.652808 IP 127.0.0.1.56573 > 127.0.0.1.5432: UDP, length 0
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]]
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require"socket"
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s = assert(socket.udp())
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r = assert(socket.udp())
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assert(r:setsockname("*", 5432))
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assert(s:setpeername("127.0.0.1", 5432))
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ssz, emsg = s:send("")
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print(ssz == 0 and "OK" or "FAIL",[[send:("")]], ssz, emsg)
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